Table of Contents
Advertisement
1. Port Data Register 7 (PDR7)
Bit
7
P7
Initial value
0
Read/Write
R/W
PDR7 is an 8-bit register that stores data for port 7 pins P7
bits are set to 1, the values stored in PDR7 are read, regardless of the actual pin states. If port 7 is
read while PCR7 bits are cleared to 0, the pin states are read.
Upon reset, PDR7 is initialized to H'00.
2. Port Control Register 7 (PCR7)
Bit
7
PCR7
Initial value
0
Read/Write
W
PCR7 is an 8-bit register for controlling whether each of the port 7 pins P7
input pin or output pin. Setting a PCR7 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin. PCR7 and PDR7 settings are valid when the
corresponding pins are designated for general-purpose input/output by bits SGS3 to SGS0 in
LPCR.
Upon reset, PCR7 is initialized to H'00.
PCR7 is a write-only register, which always reads as all 1s.
6
5
P7
P7
7
6
5
0
0
R/W
R/W
6
5
PCR7
PCR7
7
6
0
0
W
W
4
3
P7
P7
4
3
0
0
R/W
R/W
to P7
7
0
4
3
PCR7
PCR7
5
4
3
0
0
W
W
Rev. 6.00 Aug 04, 2006 page 239 of 680
Section 8 I/O Ports
2
1
P7
P7
2
1
0
0
R/W
R/W
. If port 7 is read while PCR7
2
1
PCR7
PCR7
2
1
0
0
W
W
to P7
functions as an
7
0
REJ09B0145-0600
0
P7
0
0
R/W
0
PCR7
0
0
W
Advertisement
Table of Contents
